steiner



Sept. 24,1935. G. STEINER SWITCHING APPARATUS Filed April 9, 1951 2 Sheets-Sheet 1 f Qxw IWI sept. 24, 1935. G. sTElNER swToHING APPARATUS Filea April 9, 1931 2 SheeJtS-Shee f2 Patented ,SGPL 1935 s Y .Application April i ingewon- (oLizsg-xisi This a apparatus,

such as is used icrccntroiling electric igni-y tion circuits of the in which the engines are putinope'rotionsuccessively with4 s al-startins inssneti?.`

rer aistribuunsitnefieinem or the startingmsgnetotoffthe .working magneto:

pcintimvhicnare/.ot` il planes. 'i

,i :current ci the-starting magneto. to the workingA ithssbeen hitherto tc use a-Vrwitonyhich1-wa'sxtmte" 'dependent of the the ignition circuits ctfthenrkinr. lvthtilto. uw.` a This` complicated the its weight,

importance in air- .e According tothepreeent Vve'ntion thiszdisadvantage is overcome :by the member, the function ofwhich isr todistribute thehlgh tensiony magnetos. beingcombined with the switching si. paratus` for the, control o! the ignition. circuit olthe working lliltlitcmvr f inthe accompanying drawings a constructionsl example ci the inventionpis shown. Figure 1v isa vertical section ythrough the switching lipparatus on line A--A oi' Pig. 2. Fig. 2 is s. section on line B--B of Figsl. In Fig. 3 a disgrsxnoi .connections is shown.`

1n Fig. 1 D1 isrthe connecting icrminal bolt for one of the working magnetos of one airplane engine. to whichthe contact spring El is iixed, P1 being the contact spring for the connecting terminal bolt J1 of thesecond working msgnetqi is a rotary switch of aejknown und by means of which the working xnagnetos'of sll the sirplane engines and of the starting magneto csn be short-circuited. H4 -is one o! the rotary switch structures of a known-kind i'or controlling the ignition circuits of the working magnetos of the separate engines, by means of which one or other cr both working magnetos of the airplane engine in question can be short-circuitcd. O is the commoli conductive bus bar in which the switches for the separate engines and the common shortcircuiting switch are mountedy This conductive har-is moimted on aninsulsting piste K: on the outside of the latter is fitted the casing Y A which is covered by the casing cover N.

si 'sei-isi "i PATENT. t C)Flili-CEiev i -swrromo msnsros/ff.

" como seiner. seinem, swimmer. mimiw sommi umm y Solothurn,

circuitins cables; .of thef'jtve Vverm-kim: mssnetel' provided for eachfengine. ""Ei, Ez, Ei, El and F1.' Fa, Fa. F4 src thecontsct springs which lead to the commonshotj-circuiting lswitch G. while the contact springs' L1. 1s; Lam and Mi, in; in. Mi s t mske contact with the separate switches for the diilerent engines. Dr is the connecting boit for the short-circuiting cable of thefstsrt ing magneto DN; whichfis in contact through the Y o is the commonrbus ber. P, is.the-supply',ters` minal of the' higlig tension 'current distributorif whilejfrcm thexienninsl Qi.; Q2., Qi. 'Qrthe man; tension `with! like llndivkiull, imllgllei.y i w15 The i htensioncurrentpisssesnorrithereup-HV ply y .P `the `Rjinto the current-l transmitting'member B, which; is mounted inthe rotors ,switchfmemberU lmsciej or instorting-mu' te'ri'al..k thence 'tothe conducting'piece 5T. the 20 1 outgoing terminal `Qi,v andnnsllyfto theseparate" worms llame-tw The mwhz Q mii the switches :H111 Ha." Iii euch 'provided Withvk a member .for srres'ting the; switches inthe; dit` ferent switchlntpoei'tionsgfwhich member jcon- 2li` sists oi's niednotchedplatev. a lresilient'riotcheilplete lW, whichfis yi'ixedto the switch spindl rotary switch member U ,is pressed against the bur R, whereby e good contact is also established.

In Fig. 3 V1, V2, Vs. V4 represent four internal combustion engines in accordance with the conemotional exemple. N1, Ni, Na, N4, Ns,- Na. N1 and Ns are the working magnetos provided for the 4o.

separate engines, namely two i'or eschiengine. DN is the starting magneto und is connected to the supply terminal P. From the terminals Qi, Qa. Qa, Q4 of the high tension distributor switch connecting wires lead to the high tension disq trihuting' member of the working magnetos Ni, Na, Ns. N1 of the internal combustion engines. In this way one engine after another csn be put in operation with the hand-operated starting magneto DN. G is s. short-circuiting switch which is connected to the mass M oi' the machine and to which the short-circuiting cables of the hund-operated starting magneto and those of all the working magnetos lead. In this way it is possible with s single switch motion to shortstructure centrically arranged, xseparate. switch structures disposed around the latter, said i'm'lminal bolts being electrically connected to said common short circuiting switch structure and. said separate switch structures, an insulating cas` ing plate, a common current conducting bus-bsr iixed to said insulating casing plate, said switch structures being Journalled in said bus bar, a

casingring, `a. high` tension distributor switch structure arranged between twoot said separate switch structuresmside said casing ring,v a ea-l lng cover enclosing all of said switch` structurel.

2` In a switching,apparatus for controlling the ignition circuits o: the booster and working magnetosof aeroplane engines, in combination terminal bolts, acommon short circuiting switchv i structure, separate switch structures disposed around the latter, contact springs leading from said terminal bolts to said common short circuiting ,switch structure and said separate switch structures, an insulating casing plate, a common current conducting bus bar fixed to said insulat' ing plate, said` switch` structures being journalled in said lms` bana casing ring, `a high tension distributo:- switch structure arrangedv between two o! said separate switchstructuresv inside said casing ring, a-caslng cover enclosingall of said I; In a switching apparatus iol-controlling the'` ignition circuits of the booster and working magnetcs ot aeroplane engines, in combination termlnal tants.` a common short circuiting switch separate switch structures, disposed around the latter, contact springs leading from said terminal bolts to said common short cli'-` ycuiting switch 'structure andsaid separate switch structures, an insulating casing plate, a common current conductingbus bar fixed to said insulatlngplate, said switch structures being journallcd in said bus bar, a casing ring, a high tension distributor switch structure arranged between two of said separate switch structures inside the casing ring, a notched plate xed to said insulating casing plate, said switch structures being ar- 5 ranged between said insulating casing plate and said notched plate, spindles o! said switch structures, resilient plates fixed t0 said spindles of the switch structures one for each oi the latter, balls ilxed to said resilient plates and adapted to enl0 gage the notches of said notched plate, said spindies beingjournalled in said common conducting bus bar and pressed against the latter by means of said resilient plates, a casing cover enclosing said switch structures and said notched plate. 15 j 4. In a switching apparatus for controlling the ignition circuits c! the booster and working magnetos of aeroplane engines, in combination terminal bolts, a common short circuiting switch structure, separate switch structures, disposed 20 around the latter, `contact springs leading `from said` terminal boltsto said common short circuiting switchltructure and said separate switch structureaan insulating casing plate, a common current conducting bus bar ilxed to eaid-insulat- 3,5 ing plate, said switch structures being `journalled in said bus bar, a `casing ring, agnotched plate fixed in saldinsulatlngcasing plate, said switch structures being arranged between said insulatins Vcasina plate andysaid notched plate, spindles "i0 of said switchstructur'es, resilient plates fixed to said spindleso! the switch structures one for each of thelattenballs Qilxed to said resilient plates and adapted to engage the notches of said notched plate, saidI spindles being journalled in said commonconducting busbar and pressed against the latter byf means of said resilient plaies, a high tension current supplyfbarcast integrally with" saidinsulating casing plate, a high tension current transmitting bar, a rotary 0 insulating body Journalledv in said insulating casing plate, said transmitting har being cast integrslly with thegrotary insulating body, a plu-` rality'oiy high tension conducting bars arranged around said rotary insulating body and ycasi: ines, tegrally with said insulatinrcasing plate, said current transmitting bar being adapted to transmit the current from `the current supply bar to said plurality ot conducting bars, s casing cover enclosing said switch structures and said notched 60,

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